EP1681764A3 - Variable transconductance variable gain amplifier utilizing a degenerated differential pair - Google Patents

Variable transconductance variable gain amplifier utilizing a degenerated differential pair Download PDF

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Publication number
EP1681764A3
EP1681764A3 EP05028756A EP05028756A EP1681764A3 EP 1681764 A3 EP1681764 A3 EP 1681764A3 EP 05028756 A EP05028756 A EP 05028756A EP 05028756 A EP05028756 A EP 05028756A EP 1681764 A3 EP1681764 A3 EP 1681764A3
Authority
EP
European Patent Office
Prior art keywords
variable
differential pair
degeneration resistance
gain amplifier
transconductance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05028756A
Other languages
German (de)
French (fr)
Other versions
EP1681764A2 (en
EP1681764B1 (en
Inventor
Arnoldus Venes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Broadcom Corp
Original Assignee
Broadcom Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Broadcom Corp filed Critical Broadcom Corp
Priority claimed from EP01910559A external-priority patent/EP1260015B1/en
Publication of EP1681764A2 publication Critical patent/EP1681764A2/en
Publication of EP1681764A3 publication Critical patent/EP1681764A3/en
Application granted granted Critical
Publication of EP1681764B1 publication Critical patent/EP1681764B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45197—Pl types
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3211—Modifications of amplifiers to reduce non-linear distortion in differential amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45183—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/007—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using FET type devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/331—Sigma delta modulation being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/372—Noise reduction and elimination in amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45288—Differential amplifier with circuit arrangements to enhance the transconductance
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45318—Indexing scheme relating to differential amplifiers the AAC comprising a cross coupling circuit, e.g. two extra transistors cross coupled
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45366—Indexing scheme relating to differential amplifiers the AAC comprising multiple transistors parallel coupled at their gates only, e.g. in a cascode dif amp, only those forming the composite common source transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45492—Indexing scheme relating to differential amplifiers the CSC being a pi circuit and the resistor being implemented by one or more controlled transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45644—Indexing scheme relating to differential amplifiers the LC comprising a cross coupling circuit, e.g. comprising two cross-coupled transistors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Networks Using Active Elements (AREA)

Abstract

A method of continuously tuning a transconductance is provided, as well as a voltage to current converter, a variable gain amplifier system, an integrated communications system, and related methods. A method of continuously tuning a transconductance comprises coupling a degeneration resistance from a first source of a first transistor in a differential pair of transistors to a second source of a second transistor in the differential pair of transistors, applying a second variable degeneration resistance in parallel to the first degeneration resistance in response to the application of a first variable control voltage, and applying a third variable degeneration resistance in parallel to the first degeneration resistance and the second degeneration resistance in response to the application of a second variable control voltage having a fixed voltage offset from the first variable control voltage.
EP05028756A 2000-02-15 2001-02-08 Variable transconductance variable gain amplifier utilizing a degenerated differential pair Expired - Lifetime EP1681764B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18264800P 2000-02-15 2000-02-15
EP01910559A EP1260015B1 (en) 2000-02-15 2001-02-08 Variable transconductance variable gain amplifier utilizing a degenerated differential pair

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP01910559.2 Division 2001-02-08
EP01910559A Division EP1260015B1 (en) 2000-02-15 2001-02-08 Variable transconductance variable gain amplifier utilizing a degenerated differential pair

Publications (3)

Publication Number Publication Date
EP1681764A2 EP1681764A2 (en) 2006-07-19
EP1681764A3 true EP1681764A3 (en) 2008-11-26
EP1681764B1 EP1681764B1 (en) 2011-09-14

Family

ID=36581475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05028756A Expired - Lifetime EP1681764B1 (en) 2000-02-15 2001-02-08 Variable transconductance variable gain amplifier utilizing a degenerated differential pair

Country Status (1)

Country Link
EP (1) EP1681764B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2443003A (en) * 2006-10-21 2008-04-23 Hamid Reza Sadr Manouch Naeini An adjustable linearized MOS differential transconductance amplifier
EP3217550B1 (en) * 2016-03-11 2024-01-10 Socionext Inc. Circuitry for use in comparators
US11695439B2 (en) 2020-10-30 2023-07-04 Mediatek Inc. Semiconductor chip with local oscillator buffer reused for signal transmission and associated transmission method
US11601147B2 (en) 2020-10-30 2023-03-07 Mediatek Inc. Semiconductor chip with local oscillator buffer reused for loop-back test and associated loop-back test method
US11996858B2 (en) * 2022-05-16 2024-05-28 Retym, Inc. Comparator circuit with speed control element

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58154911A (en) * 1982-03-09 1983-09-14 Matsushita Electric Ind Co Ltd Gain control amplifier
JPS58204614A (en) * 1982-05-24 1983-11-29 Toshiba Corp Forming circuit of variable alternating current resistor
EP0514655A1 (en) * 1991-05-23 1992-11-25 Matsushita Electric Industrial Co., Ltd. Semiconductor device for TV tuner and TV tuner using the same
EP0587965A1 (en) * 1992-09-16 1994-03-23 STMicroelectronics S.r.l. Differential transconductance stage, dynamically controlled by the input signal's amplitude
US5612648A (en) * 1995-03-14 1997-03-18 Standard Microsystems Corporation Transconductance-capacitance filter with extended control range
WO2000018006A1 (en) * 1998-09-21 2000-03-30 Koninklijke Philips Electronics N.V. Amplifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58154911A (en) * 1982-03-09 1983-09-14 Matsushita Electric Ind Co Ltd Gain control amplifier
JPS58204614A (en) * 1982-05-24 1983-11-29 Toshiba Corp Forming circuit of variable alternating current resistor
EP0514655A1 (en) * 1991-05-23 1992-11-25 Matsushita Electric Industrial Co., Ltd. Semiconductor device for TV tuner and TV tuner using the same
EP0587965A1 (en) * 1992-09-16 1994-03-23 STMicroelectronics S.r.l. Differential transconductance stage, dynamically controlled by the input signal's amplitude
US5612648A (en) * 1995-03-14 1997-03-18 Standard Microsystems Corporation Transconductance-capacitance filter with extended control range
WO2000018006A1 (en) * 1998-09-21 2000-03-30 Koninklijke Philips Electronics N.V. Amplifier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MENSINK C H J: "A low power, low noise, variable gain amplifier", SOLID-STATE CIRCUITS CONFERENCE, 1998. ESSCIRC '98. PROCEEDINGS OF THE 24TH EUROPEAN THE HAGUE, THE NETHERLANDS 22-24 SEPT. 1998, PISCATAWAY, NJ, USA,IEEE, 22 September 1998 (1998-09-22), pages 292 - 295, XP010823464, ISBN: 978-2-86332-235-2 *

Also Published As

Publication number Publication date
EP1681764A2 (en) 2006-07-19
EP1681764B1 (en) 2011-09-14

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